The left and right trims will have holes in them through which you'll fit your buttons. We cannot advise you on retrofitting this trim to a non M Sport wheel.
In case the above is unclear in any way, this. A listing for the steering wheel, only the spokes. We have more genuine BMW accessories which can be found in our store by clicking on the link below and then choosing the BMW category. The item "BMW E85 E86 2003-2008 Z4 M Roadster Steering Wheel Spoke Trim Set M Sport NEW" is in sale since Monday, October 19, 2020. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Interior\Steering Wheels & Horns".The seller is "euroactive" and is located in Olyphant, Pennsylvania. This item can be shipped worldwide.